Pressure relief circuit for refrigerator contained water filter

Details Pressure relief circuit for refrigerator contained water filter Pressure relief circuit for refrigerator contained water filter

1996-10-25

1998-09-29

Drodge, Joseph W.

Refrigeration

Cooled article storage compartment and cooled isolated...

Liquid container or flow line within cooled enclosure

62389, 210110, 210134, 210175, F25D 2312, B67D 562, B01D 1712

Patent

active

058132457

ABSTRACT:
A refrigerator having a water filtration and dispensing system including a first control valve for unfiltered water, a household water supply line for fluidly connecting the first control valve to a source of household water, a water filter assembly disposed within a refrigeration compartment, an unfiltered water supply line fluidly connecting the first control valve to the water filter assembly, a second control valve having first and second outlets, a filtered water supply line fluidly connecting the filter assembly to the second control valve, a filtered water dispenser fluidly connected to the first outlet of second control valve, and an ice maker disposed within a freezer compartment and fluidly connected to the second outlet of the second control valve. The system also includes a water dispenser switch for opening the first and second control valves to permit unfiltered water to flow into the water filter assembly and to permit filtered water to flow out of the water dispenser, and an ice maker switch connected for opening the first and second control valves to permit unfiltered water to flow into the water filter assembly and to permit filtered water to flow into the ice maker. A pressure-relief switch connects the water dispenser switch and the first control valve so that the first control valve can be selectively disconnected. With the first control valve disconnected, the water dispenser switch only opens the second control valve to thereby prevent unfiltered water from flowing into the water filter assembly and permit filtered water to flow out of the water dispenser. The system is thereby relieved or bled of water pressure prior to replacing the filter cartridge.

REFERENCES:
patent: 4571953 (1986-02-01), Caruso
patent: 4853117 (1989-08-01), Burrows
patent: 5064097 (1991-11-01), Brog et al.
patent: 5254243 (1993-10-01), Carr et al.
patent: 5502978 (1996-04-01), Field
patent: 5560393 (1996-10-01), Clark
patent: 5573142 (1996-11-01), Morellato et al.
patent: 5707518 (1998-01-01), Coates et al.
patent: 5715699 (1998-02-01), Coates et al.

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